Four-channel isolator that pulls its weight on a mixed-voltage bus
The MAX14932FAWE+ is a 4-channel capacitive-coupling digital isolator from Maxim Integrated, built for general-purpose isolation between two voltage domains. It gives you two channels each way — 2/2 input/output split — so it handles bidirectional SPI or two separate unidirectional signal pairs in one package. The 2750Vrms isolation rating covers basic functional isolation in industrial control, motor drives, and isolated sensor interfaces. No isolated power on board, so you still need a separate DC-DC for the secondary side. Common-mode transient immunity is rated at 25 kV/µs minimum, which is the number that matters when you are isolating across a noisy motor drive or a switching power supply. It means the output does not glitch when the ground plane jumps.
Package and temperature — field-fit check
Housed in a 16-SOIC wide-body (7.50 mm width), surface-mount. That is the standard footprint for this class of isolator — no surprises for the pick-and-place. Operating temperature covers -40°C to 125°C, so it lives in the engine bay or the factory floor without derating. No special handling beyond normal ESD precautions; the capacitive coupling core is not light-sensitive like an optocoupler, so no shielding needed.